Complex Modal Evaluation of NVH Characteristics of Disc Brake

doi:10.3969/j.issn.1000-1093.2016.07.016

Abstract

Abstract: A disc brake nonlinear finite element model is established. Noise vibration and harshness (NVH) characteristics of disc brake are evaluated by the complex mode analysis from the multiple dimensions of negative mode, frequency, damping ratio, modal coupling, modal strain energy and so on. The results show that the different parameters can reflect the instability of modal model. The model exists an instability mode in the range of 1~15 kHz frequencies. Big complex eigenvalue real part, high negative damping ratio, and poor modal stability exist in the ranges of 1~3 kHz and 12~13 kHz. Unstable modal could couple with adjacent modal easily, which increases the incidence of brake noise.

Key words: mechanics, disc brake, brake noise, complex mode, NVH evaluation

CLC Number:

U463.51

HUANG Ze-hao, LIU Tong, LEI Wei, WAN Xin. Complex Modal Evaluation of NVH Characteristics of Disc Brake[J]. Acta Armamentarii, 2016, 37(7): 1275-1281.

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